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Articles by M Okuda
Total Records ( 2 ) for M Okuda
  M Okuda , I Balan , N. M Petry , M Oquendo and C. Blanco

Pathological gambling is a common disorder with severe consequences for patients and their families. This case study describes cognitive-behavioral therapy (CBT) for pathological gambling and its general principles and provides an example of a modification of CBT techniques in the treatment of a 51-year-old immigrant Afro-Caribbean woman. The case depicts the contribution of beliefs, especially those that are part of a cultural system, to the perpetuation of a patient’s disorder; the influence of family members’ attitudes, moved by their cultural beliefs and values, in shaping the patient’s behavior; and the consideration of these issues in guiding specific interventions, such as challenging irrational thoughts or helping patients devise strategies to change their behavior in a culturally congruent manner.

  M Okuda , M Takeguchi , O O Ruairc , M Tagaya , Y Zhu , A Hashimoto , N Hanagata , W Schmitt and T. Ikoma

Magnetic nanoparticle (MNP) composites with a magnetite (Fe3O4) core and a hydroxyapatite (HAp, Ca10(PO4)6(OH)2) coating were prepared using a precipitation method and a subsequent hydrothermal treatment. The hydrothermal treatment diminished the lepidocrocite layer on the magnetite, enhanced the crystal growth of HAp and dissolved the MNPs. The divalent iron ions dissolved into solvent were not substituted for the HAp lattice. The three-dimensional (3D) nanostructure, the crystal morphology of HAp covered with the MNPs and the interfacial nanostructure of magnetite/HAp were analyzed using an energy-filter transmission electron microscopy (EF-TEM) and visualized by computer tomography in transmission electron microscopy (TEM). EF-TEM and 3D reconstruction images using a tilted series of high-angle annular dark-field images showed that the needlelike HAp nanocrystals covered with a magnetite core and the crystal growth of HAp attached to the magnetite surface was inhibited as a result of the lower density of the nucleation site of the lepidocrocite layer. The dissolution of iron ion from MNPs and the interfacial interaction of HAp and magnetite could cause the needlelike morphology of HAp nanocrystals.

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